The answer is simple:

- Print the prints and mail them - at your own risk. It's the cost of doing business in the dark ages. Include a note that tells everyone what races you will be at and invite them to buy a print that they like in any size or format.

- Don't print the images at the track - and if you REALLY want to sink 100% of your cost into a product you don't know if the potential buyer will even want, at least make the cost worth it. I bet he would sell MORE than double at $10 what he sells at $20.

- Step into the technology era. Walk around with your laptop and show people digital images. Sell them for a nice price and print them later. 1/2 the labor and 1/2 the upfront cost.